EP0400428A1 - Masses à mouler thermoplastiques à partir de copolyamides partiellement aromatiques et amorphes - Google Patents

Masses à mouler thermoplastiques à partir de copolyamides partiellement aromatiques et amorphes Download PDF

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EP0400428A1
EP0400428A1 EP90109523A EP90109523A EP0400428A1 EP 0400428 A1 EP0400428 A1 EP 0400428A1 EP 90109523 A EP90109523 A EP 90109523A EP 90109523 A EP90109523 A EP 90109523A EP 0400428 A1 EP0400428 A1 EP 0400428A1
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hexamethylenediamine
units
units derived
molding compositions
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Eckhard Michael Dr. Koch
Pipper Gunter
Hans Georg Dr. Matthies
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BASF SE
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BASF SE
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers

Definitions

  • thermoplastic molding compositions containing as essential components A) 20 to 98% by weight of a partially aromatic copolyamide, built up essentially from a1) 40 to 90% by weight of units which are derived from terephthalic acid and hexamethylenediamine, a2) 0 to 50 wt.% of units derived from ⁇ -caprolactam and a3) 0 to 60% by weight of units derived from adipic acid and hexamethylenediamine, component a2) and / or a3) making up at least 10% by weight of the total units, B) 2 to 80% by weight of an amorphous polyamide different from A), as well as beyond C) 0 to 50% by weight of an impact-modifying elastomer D) 0 to 60% by weight of fibrous or particulate fillers or mixtures thereof.
  • A 20 to 98% by weight of a partially aromatic copolyamide, built up essentially from a1) 40 to 90% by weight of units which are derived from terephthalic acid and hex
  • the invention relates to the use of these molding compositions for the production of fibers, films and other moldings and to the moldings which can be obtained as essential components using these molding compositions.
  • EP-A 70 001 discloses polyamide mixtures based on partially crystalline and amorphous copolyamides. However, the toughness properties of the moldings that can be produced therefrom are not satisfactory.
  • impact-modified polyamide mixtures are known from EP-A 73 036, which are composed of partially crystalline and amorphous copolyamides.
  • the impact strength modification with olefin copolymers has a disadvantageous effect on rigidity and solvent resistance in these mixtures.
  • the object of the present invention was therefore to provide thermoplastic molding compositions which have a good overall spectrum of mechanical properties, in particular a high level of toughness.
  • thermoplastic molding compositions defined at the outset are achieved according to the invention by the thermoplastic molding compositions defined at the outset.
  • thermoplastic molding compositions according to the invention contain 20 to 98, preferably 40 to 95 and in particular 60 to 90% by weight of a partially aromatic copolyamide with the structure described below.
  • the partially aromatic copolyamides A) contain as component a 1) 40 to 90% by weight of units which are derived from terephthalic acid and hexamethylenediamine.
  • a small proportion of the terephthalic acid preferably not more than 10% by weight of the total aromatic dicarboxylic acids used, can be replaced by isophthalic acid or other aromatic dicarboxylic acids, preferably those in which the carboxyl groups are in the para position.
  • the partially aromatic copolyamides contain units derived from ⁇ -caprolactam (a2) and / or units derived from adipic acid and hexamethylene diamine (a3).
  • the proportion of units derived from ⁇ -caprolactam is at most 50% by weight, preferably 20 to 50% by weight, in particular 25 to 40% by weight, while the proportion of units derived from adipic acid and hexamethylenediamine is up to 60% by weight, preferably 30 to 60% by weight and in particular 35 to 55% by weight.
  • the copolyamides can also contain units of ⁇ -caprolactam as well as units of adipic acid and hexamethylenediamine; in this case care must be taken to ensure that the proportion of units which are free from aromatic groups is at least 10% by weight, preferably at least 20% by weight.
  • the ratio of units that differ from ⁇ -Capro lactam and derived from adipic acid and hexamethylenediamine is not subject to any particular restriction.
  • polyamides with 50 to 80, especially 60 to 75 wt.% Units derived from terephthalic acid and hexamethylenediamine (units a1)) and 20 to 50, preferably 25 to 40 wt.% Units that derived from ⁇ -caprolactam (units a2)).
  • the partially aromatic copolyamides according to the invention can also contain minor amounts, preferably not more than 15% by weight, in particular not more than 10% by weight, of other polyamide units, as are known from other polyamides.
  • These building blocks can be derived from dicarboxylic acids with 4 to 16 carbon atoms and aliphatic or cycloalphatic diamines with 4 to 16 carbon atoms and from aminocarboxylic acids or corresponding lactams with 7 to 12 carbon atoms.
  • Suitable monomers of these types are only suberic acid, azelaic acid, sebacic acid or isophthalic acid as representatives of the dicarboxylic acids, 1,4-butanediamine, 1,5-pentanediamine, piperazine, 4,4′-diaminodicyclohexylmethane, 2,2- (4,4 ′ - Diaminodicyclohexyl) propane or 3,3'-dimethyl-4,4'-diaminodicyclohexylmethane as representatives of diamines and capryllactam, enanthlactam, omega-aminoundecanoic acid and laurolactam as representatives of lactams or aminocarboxylic acids.
  • the melting points of the partially aromatic copolyamides A) are in the range from 260 ° C. to over 300 ° C., this high melting point also being associated with a high glass transition temperature of generally more than 75, in particular more than 85 ° C.
  • Binary copolyamides based on terephthalic acid, hexamethylenediamine and ⁇ -caprolactam have contents of about 70% by weight of units derived from terephthalic acid and hexamethylenediamine, melting points in the range of 300 ° C and a glass transition temperature of more than 110 ° C .
  • Binary copolyamides based on terephthalic acid, adipic acid and hexamethylenediamine (HMD) reach melting points of 300 ° C and more even at lower contents of about 55% by weight of units of terephthalic acid and hexamethylenediamine, whereby the glass transition temperature is not quite as high as with binary copolyamides which contain ⁇ -caprolactam instead of adipic acid or adipic acid / HMD.
  • the production of the partially aromatic copolyamides A) can e.g. by the method described in EP-A 129 195 and EP-A 129 196.
  • an aqueous solution of the monomers i.e. in this case, the monomers which form the units a1) to a3), heated to a temperature of 250 to 300 ° C under increased pressure with simultaneous evaporation of water and formation of a prepolymer, then prepolymers and vapors are continuously separated, the vapors rectified and returned the carried diamines. Finally, the prepolymer is passed into a polycondensation zone and polycondensed under an excess pressure of 1 to 10 bar and a temperature of 250 to 300 ° C.
  • aqueous salt solution is heated under an excess pressure of 1 to 10 bar within a residence time of less than 60 seconds, the degree of conversion advantageously emerging at least 93% and the water content of the prepolymer at most 7% when leaving the evaporator zone. % is.
  • the partially aromatic copolyamides A) generally have triamine contents of preferably less than 0.5% by weight, in particular less than 0.3% by weight.
  • High levels of triamine can lead to one Deterioration in product quality and problems in the continuous production of the partially aromatic copolyamides.
  • the diamine which can cause such problems is in particular the dihexamethylene triamine which is formed from the hexamethylene diamine used as a monomer.
  • the aqueous solutions used generally have a monomer content of 30 to 70% by weight, in particular 40 to 65% by weight.
  • the aqueous salt solution is advantageously passed continuously at a temperature of 50 to 100 ° C. into an evaporator zone, where the aqueous salt solution is heated to a temperature of 250 to 330 ° C. under an excess pressure of 1 to 10, preferably 2 to 6 bar. It is understood that the temperature used is above the melting point of the particular polyamide to be produced.
  • the residence time in the evaporator zone is a maximum of 60 seconds, preferably 10 to 55 seconds and in particular 10 to 40 seconds.
  • the conversion on leaving the evaporator zone is advantageously at least 93, preferably 95 to 98% and the water content is preferably in the range from 2 to 5, in particular 1 to 3,% by weight.
  • the evaporator zone is advantageously designed as a tube bundle.
  • Tube bundles in which the cross section of the individual tubes is periodically recurring tubular and slit-shaped have proven particularly useful.
  • a tubular mass transfer zone which is provided with internals, before the phases are separated immediately after the evaporator zone.
  • the temperatures and pressure conditions used in the evaporator zone are observed.
  • the internals for example fillers such as Raschig rings, metal rings or in particular fillers made of wire mesh, produce a large surface.
  • the phases, ie prepolymer and vapor are brought into intimate contact. This causes the amount of diamine released with water vapor to be significantly reduced.
  • a residence time of 1 to 15 minutes is maintained in the mass transfer zone.
  • the mass transfer zone is advantageously designed as a tube bundle.
  • the two-phase mixture of steam and prepolymers emerging from the evaporator zone or mass transfer zone is separated.
  • the separation usually takes place automatically due to the physical differences in a vessel, the lower part of the vessel advantageously being designed as a polymerization zone.
  • the vapors released essentially consist of water vapor and diamines, which were released when the water evaporated. These vapors are passed into a column and rectified. Suitable columns are, for example, packed columns, bubble plate columns or sieve plate columns with 5 to 15 theoretical plates.
  • the column is advantageously operated under the same pressure conditions as the evaporator zone.
  • the diamines contained in the vapors are separated off and returned to the evaporator zone. It is also possible to feed the diamines to the subsequent polymerization zone.
  • the rectified water vapor obtained is removed from the top of the column.
  • the prepolymer obtained which, according to its degree of conversion, consists essentially of low molecular weight polyamide and any remaining amounts of unreacted salts and generally has a relative viscosity of 1.2 to 1.7, is passed into a polymerization zone.
  • the melt obtained is polycondensed at a temperature of 250 to 330 ° C., in particular 270 to 310 ° C., and under an excess pressure of 1 to 10 bar, in particular 2 to 6 bar.
  • the vapors released are advantageously rectified in the column together with the above-mentioned vapors; a residence time of 5 to 30 minutes is preferably maintained in the polycondensation zone.
  • the polyamide thus obtained which generally has a relative viscosity of 1.2 to 2.3, is continuously removed from the condensation zone.
  • the polyamide obtained in this way is passed through a discharge zone in a molten state, with simultaneous removal of the residual water contained in the melt.
  • Suitable discharge zones are, for example, degassing extruders.
  • the melt thus freed from water is then poured into strands and granulated.
  • the granules obtained are advantageously in the solid phase by means of superheated steam at a temperature below the melting point, e.g. from 170 to 240 ° C, condensed to the desired viscosity.
  • the water vapor obtained at the top of the column is advantageously used.
  • the relative viscosity measured in 1% solution (1 g / 100 ml) in 96 wt.% H2SO4 at 23 ° C, is generally after the solid phase post-condensation in the range from 2.2 to 5.0, preferably from 2.3 to 4.5.
  • the polyamide melt discharged from the polycondensation zone is passed into a further polycondensation zone, where it continuously forms new surfaces at a temperature of 285 to 310 ° C, advantageously under reduced pressure, e.g. from 1 to 500 mbar, condensed to the desired viscosity.
  • Suitable devices are known as finishers.
  • the molding compositions according to the invention contain, as component B), amorphous, partially aromatic copolyamides in an amount of 2 to 80, preferably 5 to 60,% by weight.
  • Aromatic dicarboxylic acids for the production of component B) of the molding compositions according to the invention are in general those having 7 to 20 carbon atoms, preferably 8 to 14 carbon atoms.
  • Mononuclear dicarboxylic acids bearing carboxyl groups in the meta or para position are particularly suitable, especially isophthalic acid and terephthalic acid.
  • aromatic dicarboxylic acids are, for example, 2,6-pyridinedicarboxylic acid, 1,4-naphthalenedicarboxylic acid, 1,5-naphthalenedicarboxylic acid, 2,6-naphthalenedicarboxylic acid and 4,4-diphenylsulfonedicarboxylic acid. Mixtures of two or more aromatic dicarboxylic acids can also be used, mixtures of isophthalic acid with terephthalic acid being preferred.
  • Suitable straight-chain or branched aliphatic or cycloaliphatic diamines are generally those having 4 to 20 carbon atoms, preferably 6 to 12 carbon atoms.
  • Hexamethylenediamine and its alkyl-substituted derivatives such as 2,2,4-trimethylhexamethylenediamine, 2,2,5-trimethylhexamethylenediamine and tetramethyl-substituted hexamethylenediamines are particularly preferred.
  • Suitable diamines are: tetramethylene diamine, pentamethylene diamine, 2-methylpentamethylene diamine, 2-methylhexamethylene diamine, 3-methylhexamethylene diamine, 3,4-dimethylhexamethylene diamine, 2,4,4-trimethylhexamethylene diamine, 2-methyl-4-ethylheptamethylene diamine, octamethylene diamine, octamethylene diamine , Undecamethylene diamine and dodecamethylene diamine as well as diamines of the general formula in which R1 is hydrogen or the methyl group and in which R2 and R3 is hydrogen or a C1-C-alkyl group.
  • Preferred alkyl groups are the ethyl group and especially the methyl group.
  • Mixtures of two or more diamines can also be used.
  • the amorphous copolyamides B) have a relative viscosity, measured in a 1% by volume solution in 96% by weight sulfuric acid at 23 ° C., from 1.4 to 3.4, preferably from 1.5 to 2.8.
  • the polyamides B) are generally prepared both batchwise and continuously, but preferably by continuous polycondensation processes as described in EP-A 129 195 and 129 196.
  • An additional impact-modifying rubber (elastomer) can be present as a further component C) in the thermoplastic molding compositions according to the invention in amounts of up to 50% by weight, preferably from 2 to 40% by weight and in particular from 5 to 30% by weight.
  • elastomers based on ethylene, propylene, butadiene or acrylate or mixtures of these monomers may be mentioned as impact-modifying rubbers.
  • the first preferred group is the so-called ethylene-propylene (EP) or ethylene-propylene-diene (EPDM) rubbers, which preferably have a ratio of ethylene residues to propylene residues in the range from 40:60 to 65:35.
  • EP ethylene-propylene
  • EPDM ethylene-propylene-diene
  • the Mooney viscosities (MLI + 4/100 ° C.) of such uncrosslinked EP or EPDM rubbers are preferably in the range from 25 to 100, in particular from 35 to 90 (measured on the large rotor after 4 minutes running time at 100 ° C according to DIN 53 523).
  • EP rubbers generally have practically no more double bonds, while EPDM rubbers can have 1 to 20 double bonds / 100 carbon atoms.
  • diene monomers for EPDM rubbers are conjugated dienes such as isoprene and butadiene, non-conjugated dienes with 5 to 25 carbon atoms such as 1,4-butadiene, 1,4-hexadiene, 1,5-hexadiene, 2,5- Dimethyl-1,5-hexadiene and 1,4-octadiene, cyclic dienes such as cyclopentadiene, cyclohexadiene, cyclooctadiene and dicyclopentadiene and alkenylnorbornenes such as 5-ethylidene-2-norbornene, 5-butylidene-2-norbornene, 2-methallyl-5-norbornene , 2-isopropenyl-5-norbornene and tricyclodienes such as 3-methyl-tricyclo (5.2.1.0.2.6) -3,8-decadiene or mixtures thereof.
  • conjugated dienes such as isoprene and
  • Hexadiene-1,5,5-ethylidene-norbornene and dicyclopentadiene are preferred.
  • the diene content of the EPDM rubbers is preferably 0.5 to 10, in particular 1 to 8,% by weight, based on the total weight of the rubber.
  • EP or EPDM rubbers can also be grafted with reactive carboxylic acids or their derivatives.
  • Acrylic acid, methacrylic acid and their derivatives as well as maleic anhydride are only representative here.
  • Another group of preferred rubbers are copolymers of ethylene with acrylic acid and / or methacrylic acid esters, in particular those which additionally contain epoxy groups. These epoxy groups are preferably incorporated into the rubber by adding monomers of the general formulas II or III containing epoxy groups to the monomer mixture where R1, R2, R3, R4 and R5 and R6 represent hydrogen or alkyl groups having 1 to 6 carbon atoms, m an integer from 0 to 20, n an integer from 0 to 10 and p an integer from 0 to 5 is.
  • R 1, R 2 and R 3 are preferably hydrogen, m has the value 0 or 1 and n is 1.
  • the corresponding compounds are alkyl glycidyl ether or vinyl glycidyl ether.
  • Preferred examples of compounds of the formula III are epoxy group-containing esters of acrylic acid and / or methacrylic acid, of which in turn glycidyl acrylate and glycidyl methacrylate are particularly preferred.
  • the ethylene content of the copolymers is generally in the range from 50 to 98% by weight, the proportion of monomers containing epoxy groups and the proportion of the acrylic acid and / or methacrylic acid ester in each case in the range from 1 to 49% by weight.
  • Copolymers of are particularly preferred 50 to 98.9, in particular 60 to 95% by weight of ethylene, 0.1 to 40, in particular 2 to 20% by weight of glycidyl acrylate, glycidyl methacrylate, acrylic acid and / or maleic anhydride, 1 to 45, in particular 10 to 35% by weight of n-butyl acrylate and / or 2-ethylhexyl acrylate.
  • esters of acrylic and / or methacrylic acid are the methyl, ethyl, propyl and i- or t-butyl esters.
  • vinyl esters and vinyl ethers can also be used as comonomers.
  • the ethylene copolymers described above can be prepared by processes known per se, preferably by random copolymerization under high pressure and elevated temperature. Appropriate methods are described in the literature.
  • the melt index of the ethylene copolymers is generally in the range from 1 to 80 g / 10 min (measured at 190 ° C. and 2.16 kg load).
  • Preferred elastomers C) are also graft copolymers with butadiene, butadiene / styrene, butadiene / acrylonitrile and acrylic esters, such as those e.g. in DE-A-16 94 173 and DE-A-23 48 377.
  • ABS polymers are to be mentioned in particular, as are described in DE-A-20 35 390, DE-A-22 48 242 and EP-A-22 216, the latter being particularly preferred.
  • Graft polymers can also be used as rubber C) 25 to 98% by weight of an acrylate rubber with a glass transition temperature of below -20 ° C as a graft base and 2 to 75% by weight of a copolymerizable ethylenically unsaturated monomer, the homo- or copolymers of which have a transition temperature of more than 25 ° C., as a graft be used.
  • the graft base is acrylate or methacrylate rubbers, which may contain up to 40% by weight of other comonomers.
  • the C1-C8 esters of acrylic acid or methacrylic acid and their halogenated derivatives as well as aromatic acrylic acid esters and mixtures thereof are preferred.
  • As comonomers in the graft base are acrylonitrile, methacrylonitrile, styrene, ⁇ -methylstyrene, acrylamides, methacrylamides and vinyl-C1-C6-alkyl ethers.
  • the graft base can be uncrosslinked or partially or fully crosslinked.
  • Crosslinking is achieved by copolymerization of preferably 0.02 to 5% by weight, in particular 0.05 to 2% by weight, of a crosslinking monomer with more than one double bond. Suitable crosslinking monomers are described, for example, in DE-A-27 26 256 and EP-A-50 265.
  • Preferred crosslinking monomers are triallyl cyanurate, triallyl isocyanurate, triacryloylhexahydro-s-triazine and trialkylbenzenes.
  • crosslinking monomers have more than 2 polymerizable double bonds, it is advantageous to limit their amount to not more than 1% by weight, based on the graft base.
  • Particularly preferred graft bases are emulsion polymers with a gel content of more than 60% by weight (determined in dimethylformamide at 25 ° C. according to M. Hoffmann, H. Krömer, R. Kuhn, Polymeranalytik, Georg-Thieme-Verlag, Stuttgart, 1977).
  • Particularly suitable graft monomers are styrene, ⁇ -methylstyrene, acrylonitrile, methacrylonitrile and methyl methacrylate or mixtures thereof, in particular those of styrene and acrylonitrile in a weight ratio of 90/10 to 50/50.
  • the graft yield i.e. the quotient of the amount of the grafted monomer and the amount of the graft monomer used is generally in the range from 20 to 80%.
  • Rubbers based on acrylates which can be used according to the invention are e.g. described in DE-A-24 44 584 and DE-A-27 26 256.
  • the rubbers C) preferably have a glass transition temperature of below -30 ° C., in particular below -40 ° C., which leads to good impact strength even at low temperatures.
  • the molding compositions according to the invention can contain up to 60, preferably from 5 to 50,% by weight of fibrous or particulate fillers or mixtures thereof as component D).
  • fibrous or particulate fillers or mixtures thereof are asbestos, carbon or glass fibers in the form of glass fabrics, glass mats or glass silk rovings, wollastonite.
  • the molding compositions according to the invention can contain customary additives and processing aids. Their proportion is generally up to 20, preferably up to 10% by weight, based on the total weight of components A) to D).
  • Common additives are, for example, stabilizers and oxidation retarders, agents against heat decomposition and decomposition by ultraviolet light, lubricants and mold release agents, colorants such as dyes and pigments, plasticizers and flame retardants.
  • Oxidation retarders and heat stabilizers which can be added to the thermoplastic compositions according to the invention are e.g. Group I metals halides of the periodic system, e.g. Sodium, potassium, lithium halides, optionally in combination with copper (I) halides, e.g. Chlorides, bromides or iodides. Sterically hindered phenols, hydroquinones, substituted representatives of this group and mixtures thereof, preferably in concentrations of up to 1% by weight, based on the weight of the molding composition, can be used.
  • Group I metals halides of the periodic system e.g. Sodium, potassium, lithium halides
  • copper (I) halides e.g. Chlorides, bromides or iodides.
  • Sterically hindered phenols, hydroquinones, substituted representatives of this group and mixtures thereof, preferably in concentrations of up to 1% by weight, based on the weight of the molding composition, can be used.
  • UV stabilizers are various substituted resorcinols, salicylates, benzotriazoles and benzophenones, which are generally used in amounts of up to 2.0% by weight.
  • Lubricants and mold release agents which are generally added in amounts of up to 1% by weight of the thermoplastic composition, are stearic acids, stearyl alcohol, alkyl stearates and amides, and esters of pentaerythritol with long-chain fatty acids.
  • the molding compositions according to the invention can be produced by processes known per se by mixing the starting components in conventional mixing devices, such as screw extruders, Brabender mills or Banbury mills, and then extruding them. After the extrusion, the extrudate is cooled and crushed.
  • the mixing temperatures are generally in the range from 280 to 350 ° C.
  • the molding compositions according to the invention are distinguished by a good overall spectrum of properties, in particular good rigidity, and are therefore suitable for the production of moldings of all types, fibers and films.
  • aqueous solution consisting of 35 kg of ⁇ -caprolactam, 55 kg of terephthalic acid, 38.5 kg of hexamethylenediamine and 128.5 kg of water was removed from a heated storage container at approx. 80 ° C. at a rate corresponding to a quantity of polyamide of 5 kg / hour a metering pump in a partly horizontally, partly vertically arranged tube evaporator.
  • the evaporator was heated with a liquid heat transfer medium, which had a temperature of 295 ° C, with vigorous circulation.
  • the evaporator had a length of 3 m and a content of 180 ml and a heat transfer surface of about 1300 cm2.
  • the residence time in the evaporator was 50 seconds.
  • the mixture of prepolymers and water vapor emerging from the evaporator had a temperature of 290 ° C. and was separated in a separator into water vapor and melt.
  • the melt remained in the separator for a further 10 minutes and was then discharged in the form of strands by means of a discharge screw with an evaporation zone, solidified in a water bath and then pelletized.
  • the separator and the evaporator zone were kept under a pressure of 5 bar by means of a pressure maintaining device which was arranged after the column.
  • the water vapor separated off in the separator was passed into a packed column with about 10 theoretical plates, into which about 1 l of vapor condensate per hour were added at the top to produce reflux.
  • the water vapor emerging after the expansion valve was condensed and had a hexamethylenediamine content of less than 0.05% by weight and a ⁇ -caprolactam content of less than 0.1% by weight.
  • the bottom of the column was an aqueous solution of hexamethylene diamine, which contained 80% by weight of hexamethylene diamine and 1 to 3% ⁇ -caprolactam, based in each case on the polyamide produced. This solution was added to the starting salt solution again via a pump before entering the evaporator.
  • the prepolymer After the evaporator, the prepolymer had a relative viscosity of 1.25, measured in 96% strength by weight sulfuric acid at 20 ° C. and had a conversion of 93 to 95% according to the end group analysis.
  • the bis-hexamethylenetriamine content was 0.1 to 0.15% by weight, based on polyamide.
  • the polyamide had a very light intrinsic color and an extremely low content of bis-hexamethylenetriamine of 0.17% and a relative viscosity of 1.65 to 1.80.
  • the product had approximately equivalence of carboxyl and amino end groups.
  • the extractable content (extraction with methanol) was 3.1 to 3.3% by weight.
  • the melt was then depressurized to normal pressure in the discharge extruder and practically no longer condensed with a residence time of less than 1 minute.
  • the extractable content was then 0.2% by weight (methanol extract).
  • An amorphous copolyamide made of: 60% by weight of an equimolar mixture of hexamethylenediamine and isophthalic acid and 40% by weight of an equimolar mixture of hexamethylenediamine and terephthalic acid
  • the relative viscosity ⁇ rel was 1.8 measured in 96% by weight sulfuric acid (1 g / 100 ml) at 23 ° C; the copolyamide had a glass transition temperature of 140 ° C.
  • Components A) and A *) and B) were melted in a twin-screw extruder at a temperature of 320 ° C., extruded and granulated.
  • the granules were injection molded to determine the modulus of elasticity (according to DIN 53 452), the tensile strength (according to DIN 53 455), the Izod impact strength (according to ISO 180, method A) and the notched impact strength (according to DIN 53 453).

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Polyamides (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
EP90109523A 1989-05-31 1990-05-19 Masses à mouler thermoplastiques à partir de copolyamides partiellement aromatiques et amorphes Withdrawn EP0400428A1 (fr)

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DE19893917600 DE3917600A1 (de) 1989-05-31 1989-05-31 Thermoplastische formmassen aus teilaromatischen und amorphen copolyamiden
DE3917600 1989-05-31

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JP (1) JPH0312452A (fr)
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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0523445A2 (fr) * 1991-07-04 1993-01-20 Ems-Inventa Ag Masses à mouler thermoplastiques à base de polyamides semi-cristallins et amorphes, leur utilisation et leur méthode de préparation
WO1993009182A1 (fr) * 1991-11-01 1993-05-13 E.I. Du Pont De Nemours And Company Compositions de resine polyamide
EP0576951A1 (fr) * 1992-07-03 1994-01-05 Bayer Ag Masses à mouler à base de polyamides difficilement inflammable
EP0728812A1 (fr) * 1995-02-08 1996-08-28 Basf Aktiengesellschaft Masses à mouler thermoplastiques à base de copolyamides semi-aromatiques et amorphes
FR2754538A1 (fr) * 1994-09-22 1998-04-17 Du Pont Composition de resine de polyamide aromatique cristallin
WO1998024847A1 (fr) * 1996-12-04 1998-06-11 E.I. Du Pont De Nemours And Company Composition de resine polyamide resistant aux impacts
WO1998046681A1 (fr) * 1997-04-11 1998-10-22 Basf Aktiengesellschaft Corps moules thermoplastiques comportant des segments de differentes rigidites
NL1004371C2 (nl) * 1996-10-28 1999-03-23 Du Pont Samenstelling omvattende een aromatische polyamidehars.
EP1158022A1 (fr) * 2000-05-24 2001-11-28 Ube Industries, Ltd. Composition à base de polyamide ayant une résistance à la soudure excellente
DE10057455A1 (de) * 2000-11-20 2002-05-29 Ems Chemie Ag Polyamid-Formmassen mit verbesserten Eigenschaften
WO2012022993A1 (fr) * 2010-08-17 2012-02-23 Sasvari Gabor Procédé de préparation de parements en pierre flexibles ayant une surface naturelle
US20120108127A1 (en) * 2010-10-29 2012-05-03 E.I. Du Pont De Nemours And Company Polyamide composite structures and processes for their preparation
WO2020260232A1 (fr) 2019-06-24 2020-12-30 Basf Se Composition de moulage thermoplastique

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KR20140090220A (ko) * 2006-01-13 2014-07-16 미쓰비시 엔지니어링-플라스틱스 코포레이션 휴대 전자 기기용 폴리아미드 수지 조성물 및 휴대 전자 기기용 성형품
US11692063B2 (en) 2016-10-21 2023-07-04 Dupont Polymers, Inc. Filament compositions for fused filament fabrication and methods of use thereof

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EP0070001A1 (fr) * 1981-07-09 1983-01-19 E.I. Du Pont De Nemours And Company Mélanges de polyamides
EP0073036A1 (fr) * 1981-08-21 1983-03-02 E.I. Du Pont De Nemours And Company Mélanges de polyamide durcis
EP0312930A1 (fr) * 1987-10-20 1989-04-26 BASF Aktiengesellschaft Masses à mouler thermoplastiques à partir de compositions de polyamides
DE3823803A1 (de) * 1988-07-14 1990-01-18 Basf Ag Thermoplastische formmassen auf der basis von polyamidmischungen

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EP0070001A1 (fr) * 1981-07-09 1983-01-19 E.I. Du Pont De Nemours And Company Mélanges de polyamides
EP0073036A1 (fr) * 1981-08-21 1983-03-02 E.I. Du Pont De Nemours And Company Mélanges de polyamide durcis
EP0312930A1 (fr) * 1987-10-20 1989-04-26 BASF Aktiengesellschaft Masses à mouler thermoplastiques à partir de compositions de polyamides
DE3823803A1 (de) * 1988-07-14 1990-01-18 Basf Ag Thermoplastische formmassen auf der basis von polyamidmischungen

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0523445A2 (fr) * 1991-07-04 1993-01-20 Ems-Inventa Ag Masses à mouler thermoplastiques à base de polyamides semi-cristallins et amorphes, leur utilisation et leur méthode de préparation
EP0523445A3 (en) * 1991-07-04 1993-04-28 Ems-Inventa Ag Thermoplastic mouldings from semi-crystalline and amorphous polyamides, their use and process for their production
WO1993009182A1 (fr) * 1991-11-01 1993-05-13 E.I. Du Pont De Nemours And Company Compositions de resine polyamide
EP0576951A1 (fr) * 1992-07-03 1994-01-05 Bayer Ag Masses à mouler à base de polyamides difficilement inflammable
FR2754538A1 (fr) * 1994-09-22 1998-04-17 Du Pont Composition de resine de polyamide aromatique cristallin
EP0728812A1 (fr) * 1995-02-08 1996-08-28 Basf Aktiengesellschaft Masses à mouler thermoplastiques à base de copolyamides semi-aromatiques et amorphes
NL1004371C2 (nl) * 1996-10-28 1999-03-23 Du Pont Samenstelling omvattende een aromatische polyamidehars.
WO1998024847A1 (fr) * 1996-12-04 1998-06-11 E.I. Du Pont De Nemours And Company Composition de resine polyamide resistant aux impacts
WO1998046681A1 (fr) * 1997-04-11 1998-10-22 Basf Aktiengesellschaft Corps moules thermoplastiques comportant des segments de differentes rigidites
EP1158022A1 (fr) * 2000-05-24 2001-11-28 Ube Industries, Ltd. Composition à base de polyamide ayant une résistance à la soudure excellente
US6541559B2 (en) 2000-05-24 2003-04-01 Ube Industries, Ltd. Polyamide resin composition showing excellent weld strength
DE10057455A1 (de) * 2000-11-20 2002-05-29 Ems Chemie Ag Polyamid-Formmassen mit verbesserten Eigenschaften
DE10057455C2 (de) * 2000-11-20 2003-11-06 Ems Chemie Ag Polyamid-Formmassen mit verbesserten Eigenschaften
WO2012022993A1 (fr) * 2010-08-17 2012-02-23 Sasvari Gabor Procédé de préparation de parements en pierre flexibles ayant une surface naturelle
US20120108127A1 (en) * 2010-10-29 2012-05-03 E.I. Du Pont De Nemours And Company Polyamide composite structures and processes for their preparation
WO2020260232A1 (fr) 2019-06-24 2020-12-30 Basf Se Composition de moulage thermoplastique

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